Project:Home: Difference between revisions

Latest revision as of 12:10, 12 June 2024

Wikibase World is a collaborative database of the Wikibase ecosystem, including individual Wikibase instances, itself running on Wikibase. By mapping Wikibases together based on the records they have in common, we make our individual databases interoperable with each other, building a greater open data ecosystem.

Add your Wikibase!

Feel free to create an entry for your Wikibase on this wiki if:

It is available for the public to consume (either read-only or read-write)
It intends to continue on an indefinite basis; in other words, it will not be deleted in the near future

To add your Wikibase:

Create a new item with your name of the Wikibase as the label and "Wikibase site" or something else as the description
Add a instance of (P3) claim with value Wikibase site (Q10)
- Add a URL (P1) claim with the URL to your Wikibase
- Add more properties if there are any—you can create items as needed to link to your Wikibase's item
If your Wikibase has an exact match property (like Wikidata's), register it on Wikibase World's Property:P4

Browse

Missing properties on items describing wikibase instances

Data model

See Project:Properties

Cool Wikibase NetworkWikibase WorldLibrarybaseInternet DomainsOpen Miscellaneous

@@ Line 1: / Line 1: @@
-A spiritual successor to the Wikibase Registry, '''''[[Item:Q3|Wikibase World]]''''' is the Wikibase of Wikibases.
+'''''[[Item:Q3|Wikibase World]]''''' is a collaborative database of the Wikibase ecosystem, including individual Wikibase instances, itself running on Wikibase. By mapping Wikibases together based on [[Property:P4|the records they have in common]], we make our individual databases interoperable with each other, building a greater open data ecosystem.
 ==Add your Wikibase!==
 Feel free to create an entry for your Wikibase on this wiki if:
-* It is available for the public to consume (either read-only or read-write)
+# It is available for the public to consume (either read-only or read-write)
-* It intends to continue on an indefinite basis; in other words, it is not a temporary or interim Wikibase
+# It intends to continue on an indefinite basis; in other words, it will not be deleted in the near future
+To add your Wikibase:
 # '''[[Special:NewItem|Create a new item]]''' with your name of the Wikibase as the label and "Wikibase site" or something else as the description
 # Add a [[Property:P3|instance of]] (P3) claim with value [[Item:Q10|Wikibase site]] (Q10)
-# Add a [[Property:P1|URL]] (P1) claim with the URL to your Wikibase
+#* Add a [[Property:P1|URL]] (P1) claim with the URL to your Wikibase
-# Add [[Project:Properties|more properties]] if there are any
+#* Add [[Project:Properties|more properties]] if there are any—you can create items as needed to link to your Wikibase's item
-# If your Wikibase has an '''[https://www.w3.org/2009/08/skos-reference/skos.html#exactMatch exact match]''' property (like [https://wikidata.org/wiki/Property:P2888 Wikidata's]), register it on Wikibase World's [[Property:P4]].
+# If your Wikibase has an '''[https://www.w3.org/2009/08/skos-reference/skos.html#exactMatch exact match]''' property (like [https://wikidata.org/wiki/Property:P2888 Wikidata's]), register it on Wikibase World's [[Property:P4]]
 ==Browse==
-* '''[https://wikibase.world/query/#PREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3FitemLabel%20%3Furl%20%3Fitem%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20%20%20%3Fitem%20wdt%3AP1%20%3Furl%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D All Wikibases on this wiki]'''
+* '''[https://wikibase.world/query/#%23title%3A%20Wikibases%2C%20and%20some%20descriptors%0APREFIX%20wwdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wwd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3Fwikibase%20%3FwikibaseLabel%20%3FwikibaseUrl%20%3Finception%20%28sample%28%3Fdesc%29%20as%20%3Fdescription%29%20%28group_concat%28distinct%20str%28%3FauthorName%29%3B%20SEPARATOR%3D%22%20%26%20%22%29%20as%20%3Fauthors%29%0AWHERE%20%7B%0A%20%20%20%20%3Fwikibase%20wwdt%3AP3%20wwd%3AQ10.%0A%20%20%20%20optional%20%7B%3Fwikibase%20wwdt%3AP5%20%3Finception.%7D%20%0A%20%20%20%20optional%20%7B%3Fwikibase%20schema%3Adescription%20%3Fdesc.%7D%0A%20%20%20%20optional%20%7B%3Fwikibase%20wwdt%3AP1%20%3FwikibaseUrl.%7D%20%0A%20%20%20%20optional%20%7B%3Fwikibase%20wwdt%3AP17%20%3Fauthor.%20%3Fauthor%20rdfs%3Alabel%20%3FauthorName.%7D%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D%20group%20by%20%3Fwikibase%20%3FwikibaseLabel%20%3FwikibaseUrl%20%3Finception%20%3Fdescription%20%3Fauthors%20order%20by%20%3Finception All Wikibases on this wiki, with some descriptors]'''
 ** [https://wikibase.world/query/#PREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3FitemLabel%20%3Furl%20%3Fitem%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20%20%20%3Fitem%20wdt%3AP1%20%3Furl%20.%0A%20%20%20%20%3Fitem%20wdt%3AP13%20wd%3AQ54%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Only Wikibases that are currently online]
-* '''[https://wikibase.world/query/#PREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3FitemLabel%20%3FavailabilityLabel%20%3Furl%20%3Fitem%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ11%20.%0A%20%20%20%20OPTIONAL%20%7B%20%3Fitem%20wdt%3AP1%20%3Furl%20.%20%7D%0A%20%20%20%20OPTIONAL%20%7B%20%3Fitem%20wdt%3AP13%20%3Favailability%20.%20%7D%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Known Wikibase hosts]'''
+** [https://wikibase.world/query/#PREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20%3Furl%20%3FinceptionDate%0AWHERE%20%7B%0A%20%20%3Fitem%20wdt%3AP2%20wd%3AQ5.%0A%20%20%3Fitem%20wdt%3AP1%20%3Furl.%0A%20%20%3Fitem%20wdt%3AP5%20%3FinceptionDate.%0A%20%20%3Fitem%20wdt%3AP13%20wd%3AQ54.%0A%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D%0AORDER%20BY%20%3FinceptionDate Only Wikibases that are currently online with their inception date]
-* '''[https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20%3Fwikibase%20%3FwikibaseLabel%20WHERE%20%7B%0A%20%20%20%20%3Fwikibase%20wdt%3AP18%20%3Fitem%20.%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ88%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Apps supported by Wikibase]'''
+* [https://wikibase.world/query/#%23Wikibase%20World%20Ontology%20Classes%20and%20number%20of%20instances%0APREFIX%20wwd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wwdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fclass%20%3FclassLabel%20%28count%28%3Finstance%29%20as%20%3Finstances%29%20WHERE%20%7B%0A%20%20%20%20%3Fclass%20wwdt%3AP3%20wwd%3AQ9%20.%0A%20%20%20%20%3Finstance%20wwdt%3AP3%20%3Fclass%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D%20group%20by%20%3Fclass%20%3FclassLabel%20%3Finstances%20order%20by%20desc%28%3Finstances%29 Classes used on this wiki, and number of instances]
-* [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ9%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Classes used on this wiki]
+** '''[https://wikibase.world/query/#PREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0APREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0A%0ASELECT%20%3FitemLabel%20%3FavailabilityLabel%20%3Furl%20%3Fitem%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ11%20.%0A%20%20%20%20OPTIONAL%20%7B%20%3Fitem%20wdt%3AP1%20%3Furl%20.%20%7D%0A%20%20%20%20OPTIONAL%20%7B%20%3Fitem%20wdt%3AP13%20%3Favailability%20.%20%7D%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Known Wikibase hosts]'''
-* [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ61%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D MediaWiki extensions]
+** '''[https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20%3Fwikibase%20%3FwikibaseLabel%20WHERE%20%7B%0A%20%20%20%20%3Fwikibase%20wdt%3AP18%20%3Fitem%20.%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ88%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Apps supported by Wikibase]'''
-* [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ95%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Gadgets]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ61%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D MediaWiki (non-Wikibase) extensions]
-* [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ69%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D People]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ222%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Wikibase extensions]
-* [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ116%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Copyright licenses]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ283%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Wikibase tools]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ95%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Gadgets]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ69%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D People]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ116%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Copyright licenses]
+** [https://wikibase.world/query/#PREFIX%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0APREFIX%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP3%20wd%3AQ143%20.%0A%20%20%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D Software feature vocabulary]
+'''Missing properties on items describing wikibase instances'''
-==Migration from Wikibase Registry==
+* [https://wikibase.world/query/#prefix%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0Aprefix%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0Aselect%20%3Fid%20%3Flicense%20where%20%7B%0A%20%20%3Fid%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP9%20%3Flicense%20.%20%7D%0A%7D Items with or without licenses]
-As of 11 June 2023, Wikibase World has imported all relevant entries from the Wikibase Registry, cleaning them up and updating them. A [https://phabricator.wikimedia.org/P49426 mapping between the wikis] has been created.
+* [https://wikibase.world/query/#prefix%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0Aprefix%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0Aselect%20%3Fid%20%3Fqueryui%20where%20%7B%0A%20%20%3Fid%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP7%20%3Fqueryui%20.%20%7D%0A%7D Items with or without link to query UI]
+* [https://wikibase.world/query/#prefix%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0Aprefix%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0Aselect%20%3Fid%20%3Fqueryendpoint%20where%20%7B%0A%20%20%3Fid%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP8%20%3Fqueryendpoint%20.%20%7D%0A%7D Items with or without link to query SPARQL endpoint]
+* [https://wikibase.world/query/#prefix%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0Aprefix%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0Aselect%20%3Fid%20%3Favailability%20where%20%7B%0A%20%20%3Fid%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP13%20%3Favailability%20.%20%7D%0A%7D Items with or without availability status]
+* [https://wikibase.world/query/#prefix%20wdt%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fprop%2Fdirect%2F%3E%0Aprefix%20wd%3A%20%3Chttps%3A%2F%2Fwikibase.world%2Fentity%2F%3E%0Aselect%20%3Fid%20%3Finception%20%3Fdiscontinuation%20where%20%7B%0A%20%20%3Fid%20wdt%3AP3%20wd%3AQ10%20.%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP5%20%3Finception%20.%20%7D%0A%20%20optional%20%7B%20%3Fid%20wdt%3AP28%20%3Fdiscontinuation%20.%20%7D%0A%7D Inception date, discontinuation date]
 ==Data model==